CHAPEL HILL, N.C. (AP) Gene Chizik built one of the nation's top defenses as an Auburn assistant, worked as defensive coordinator during Texas' national-championship run then returned to the Tigers to win another title as head coach.

That history explains why North Carolina is counting on Chizik to fix its woeful defense.

Approaching three years after he was fired from Auburn, Chizik is back in coaching as the Tar Heels' defensive coordinator. He inherits a defense that surrendered more points and yards than any team in program history as UNC opens preseason camp Monday.